The engine immobiliser system is designed to prevent the vehicle from being stolen. This system uses a transponder key ecu that stores the key codes of authorized ignition keys. If an attempt is made to start the engine using an unauthorized key, the ecu sends a signal to the ecm to prohibit fuel delivery and ignition, effectively disabling the engine.

The transponder key coil receives this signal, the transponder key amplifier amplifies it, and then the signal is transmitted to the ecu. The ecu matches the key's id code with the vehicle's id code, which was previously registered in the ecu and then communicates the results to the ecm using sfi communication.
Engine immobiliser system
How to proceed with troubleshootingBody
General maintenance
Tighten bolts and nuts
Tighten the bolts and nuts on the chassis parts listed
below, if necessary.
Front axle and suspension
Drivetrain
Rear axle and suspension
Brake system
Engine mounting
Other chassis parts
Tighten the bolts and nuts on the bo ...
Operating an ipod
Connecting an ipod enables you to enjoy music from the vehicle
speakers.
Connecting an ipod
Open the cover and connect
an ipod using an ipod cable.
Turn on the power of the ipod if
it is not turned on.
Press the “media” button repeatedly until “ipod” is displayed.
...
Air fuel ratio sensor
Components
On-vehicle inspection
Check air fuel ratio compensation system
Connect the intelligent tester to the dlc3.
Turn the ignition switch on.
Select the following menu items: data list / a/fs b1
s1 and o2s b1 s2.
Warm up the a/f sensor with the engine speed at
2,500 ...